cmd/geth, internal/flags: print envvar config source and bad names #28119
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holiman
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Sep 15, 2023
| if err := debug.Setup(ctx); err != nil { | ||
| return err | ||
| } | ||
| flags.CheckEnvVars(ctx, app.Flags, "GETH") |
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| flags.CheckEnvVars(ctx, app.Flags, "GETH") | |
| flags.CheckEnvVars(ctx, app.Flags, "GETH_") |
maybe?
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Unsure. I deliberately left it as GETH only so that if you forget the underscore or use a minus or something it still gets caught. That said, it's mostly a heuristic for now.
holiman
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Sep 15, 2023
| if ctx.Count(flag) > 0 { | ||
| log.Info("Config environment variable found", "envvar", key, "shadowedby", "--"+flag) | ||
| } else { | ||
| log.Info("Config environment variable found", "envvar", key) |
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In some cases. cmd line params are sensitive (password for remote influxdb databases, password for --unlock), but this will echo them in logs, right?
Might not be the best idea -- so far, we've been kind rightfully lax about asking people for their logs, because we know they contain nothing interesting.
Ah wait, it's only the key, not the value? If so it's all good!
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Yes, only key for the exact reason.
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…names (ethereum#28119)" This reverts commit c59e4a4.
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…names (ethereum#28119)" This reverts commit c59e4a4.
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One catch with env vars is that they might silently change Geth's behavior, in both directions:
Both cases would be quite tricky to debug. Further it would be a PITA for us to debug user issues when they don't share their env list, and sharing them may not be best security practice.
This PR tries to solve all 3 issues, by listing all the consumed env vars, as well as all the env vars that "seem" like GETH ones, but that are not consumed in the end.
TL;DR: